/*
 * Copyright 2002-2017 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.validation.beanvalidation;

import javax.validation.MessageInterpolator;
import javax.validation.TraversableResolver;
import javax.validation.Validation;
import javax.validation.Validator;
import javax.validation.ValidatorContext;
import javax.validation.ValidatorFactory;

import org.springframework.beans.factory.InitializingBean;
import org.springframework.lang.Nullable;

/**
 * Configurable bean class that exposes a specific JSR-303 Validator
 * through its original interface as well as through the Spring
 * {@link org.springframework.validation.Validator} interface.
 *
 * @author Juergen Hoeller
 * @since 3.0
 */
public class CustomValidatorBean extends SpringValidatorAdapter implements Validator, InitializingBean {

    @Nullable
    private ValidatorFactory validatorFactory;

    @Nullable
    private MessageInterpolator messageInterpolator;

    @Nullable
    private TraversableResolver traversableResolver;


    /**
     * Set the ValidatorFactory to obtain the target Validator from.
     * <p>Default is {@link javax.validation.Validation#buildDefaultValidatorFactory()}.
     */
    public void setValidatorFactory(ValidatorFactory validatorFactory) {
        this.validatorFactory = validatorFactory;
    }

    /**
     * Specify a custom MessageInterpolator to use for this Validator.
     */
    public void setMessageInterpolator(MessageInterpolator messageInterpolator) {
        this.messageInterpolator = messageInterpolator;
    }

    /**
     * Specify a custom TraversableResolver to use for this Validator.
     */
    public void setTraversableResolver(TraversableResolver traversableResolver) {
        this.traversableResolver = traversableResolver;
    }


    @Override
    public void afterPropertiesSet() {
        if (this.validatorFactory == null) {
            this.validatorFactory = Validation.buildDefaultValidatorFactory();
        }

        ValidatorContext validatorContext = this.validatorFactory.usingContext();
        MessageInterpolator targetInterpolator = this.messageInterpolator;
        if (targetInterpolator == null) {
            targetInterpolator = this.validatorFactory.getMessageInterpolator();
        }
        validatorContext.messageInterpolator(new LocaleContextMessageInterpolator(targetInterpolator));
        if (this.traversableResolver != null) {
            validatorContext.traversableResolver(this.traversableResolver);
        }

        setTargetValidator(validatorContext.getValidator());
    }

}
